diff options
Diffstat (limited to 'color.c')
| -rw-r--r-- | color.c | 40 |
1 files changed, 33 insertions, 7 deletions
@@ -8,6 +8,39 @@ #include "graphics.h" #include "internal.h" +ulong +col2ul(Color c) +{ + uchar cbuf[4]; + + cbuf[0] = fclamp(c.a, 0, 1)*0xFF; + cbuf[1] = fclamp(c.b, 0, 1)*0xFF; + cbuf[2] = fclamp(c.g, 0, 1)*0xFF; + cbuf[3] = fclamp(c.r, 0, 1)*0xFF; + return cbuf[3]<<24 | cbuf[2]<<16 | cbuf[1]<<8 | cbuf[0]; +} + +Color +ul2col(ulong l) +{ + Color c; + + c.a = (l & 0xff)/255.0; + c.b = (l>>8 & 0xff)/255.0; + c.g = (l>>16 & 0xff)/255.0; + c.r = (l>>24 & 0xff)/255.0; + return c; +} + +int +hasalpha(ulong chan) +{ + for(; chan; chan >>= 8) + if(TYPE(chan) == CAlpha) + return 1; + return 0; +} + /* * see also “The Importance of Being Linear”, Gritz and d'Eon, GPU Gems 3, Ch. 24, December 2007 */ @@ -141,13 +174,6 @@ linear2srgb(Color c) return c; } -ulong -rgba2xrgb(ulong c) -{ - return (c & 0xFF)<<24|(c>>24 & 0xFF)<<16| - (c>>16 & 0xFF)<<8|(c>>8 & 0xFF); -} - /* tone mapping */ |